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.........could have found the mobile phone's number using its menu function......
Did that recently when away from home, when I kicked one of the new super -expensive super-phones out of a grass verge, the chances of it being a bomb designed to kill a passing dog - or me - were totally remote, and anyway by now I'd kicked it, but I couldn't work out how to use the darned thing but eventually found a number labelled 'Mum', so rang it and got the owners mother ( not surprisingly) who contacted the owner, who came around to the Starbucks that I had visited for free WiFi and paid for my coffee - with thanks ! ( no comments about drinking Starbucks coffee pls. the WiFi was free. QED )
( used to be a Boy Scout, too, when Good Deeds were restricted to helping Old Ladies across the road - even if they didn't want to cross )